html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

#base-area {
    width: 100%;
    position: relative;
    height: 100%;
}

.navbar {
    margin-bottom: 0;
}

.side-menu {
    width: 12%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    list-style: none;
    padding-left: 0;
}

.side-menu > li {
    text-align: center;
    width: 100%;
    line-height: 50px;
    cursor: pointer; /*鼠标放上去有小手*/
    border-left: 1px solid #cccccc;
    border-top: 1px solid #cccccc;
    border-bottom: 1px solid #cccccc;
}

h1 {
        margin: 5%;
}

.base-content {
    width: 88%;
    height: 100%;
    position: absolute;
    top: 0;
    right: 0;
    border-left: 1px solid #cccccc;
}